I’ve had that thought before. Once, on a run through some woods, I got really lost and could only figure out how to get back to my car by following a creek – literally walking in the creek because the woods were so brambly. It occurred to me that if I slipped and hit my head, I would be a skeleton before anyone found me. Maybe you should wear one of those devices they give to old people who can’t get up. You might have a few seconds before you blackout to push the button.